Fuel-feeding system for motor vehicles



Jan, 14, 1930. A. s. REbMo D FUEL FBED G sYsTEM'FoR MOTOR VEHICLES Filed March 25, 1926 Patented Jan. 14, 1933 UNITED STATES PATENT OFFICE ALBERT G. REDMOND, or FLINT, MICHIGAN, ASSIGNOR r0 MARVEL. CARlZURE'IER oom- PANY, or FLINT, MICHIGAN, A CORPORATION or INDIANA ,FUEL-FEEDING SYSTEM FOR MOTOR VEHICLES Original application filed April 30, 1925 This invention relates to' a fuel feeding system for motor vehicles and is adivisional application of my application filed April 30, 1925, Serial Number 27,114, the object being to provide a fuel feeding system in which a diaphragm pump is operated by a forced feed lubricating system of the internal combustion engine, whereby I am able to utilize the pressure from the lubricating system of the engine for operating a pump for raising fuel from a low level tank to a receiving chamber arranged above the charge of the invention will be hereinafter set forth and the novel features thereof defined by the appended claims.

In the drawings,

Figure 1 is a side elevation of an internal combustion engine showing diagrammatically my improved construction of fuel feeding system thereto;

Figure 2 is a vertical section through the pumping mechanism; and

Figure 3 is a vertical section through the receiving tank and circuit maker-and breaker. for the electric starter. 1

In the drawing lindicates an internal combustion engine, 2 a charge forming device having the usual float chamber, 3 an air-tight receiving chamber having an air inlet 4 closed by a valve 5 forming the core of the solenoid 6 which is arranged in electric circuit having asource of current in the form of a bat tery 7, the circuit maker and breaker 8 being disposed in said circuit for'controlling the flow of electrical energy to electric starter 9, which is provided with a pinion 10 adapted to engage the toothed fly wheel 11 further object of the inven-.

Other and further objects and advantages Serial No. 27,114. Divided and this application-filed March 25, 1926. Serial No. 97,356.

of the motor for starting the same.

The receiving tank 3 is connected to the float-bowl of-the carbureter by a pipe 12 and is provided with a pi e 13 extending from a valve chamber 14 in W iich is mounted a check valve 15 for closing the outlet port of a chamber 16, which is provided with a check valve 17 controlling the inlet port from which extends a pipe 18 from a low level reservoir 19 disposed at any suitable place preferably at the rear of the motor vehicle.

The chamber 14 is provided with an outlet 20 extending to a chamber 21 in which is mounteda spring pressed relief valve 22 and from this chamber extends pipe 23 to the'pipe 18 so that fuel can flow back from the cham ber 14 into the suction line of the pump as will be hereinafter fully described.

Secured to the casting forming the chambers 14 and 16 is a cup-shaped disc 24 to which is connected a cup-shaped disc 25 between which are arranged a series of fabric discs 26 formed impervious to gasoline and oil forming a diaphragm pump. The disc 25 1s providedwith an extension 27 terminating in a valve casing 28 in which is mounted a snap valve 29 having a central opening 30 surrounded by a coil wire ring 31, through which extends a double conical enlargement 32 formed on a rod 33. which extends through the flexible disc and is secured to disc 34 carried thereby, said rod being surrounded by a coil spring 35, the end of the rod working in a bore formed in the casting forming the and forced out through said passage so as to deliver fuel tothe receiving chamber 3.

In order to utilize the pressure of theforced-fe'ed lubricating system of an internal combustion engine for operating the diaphragm, I provide the valve casing 28 with ports 37, 38, 39 and 40 which are adapted to the valve is opened.

be opened and closed bythe valve 29 as will be later described.

The ports 39 and 40 are connected to openings formed in the cup-shaped disc. by pipes 42 and ,41 and the port 37 is connected to the pump line of the lubricating system by apipe 43 so that lubricant under pressure Will be forced into the chamber 28 when a The outlet port 38 of the valve casing is connected to the crank case by a pipe 44 so that lubricant is returned to the crank-case after passing into the pump chamber to operatethe diaphragm. When the'valve 29'is in the position shown, the pressure of the oil in the lubricating system. of the internal combustion engine is against thejside of the flex ible disc so as to force the diaphragm to the right so as to compress the spring and as the diaphragm moves to the right, it carries the rod .33 withit so that the double enlargement rides through the valve and the valve snaps or'rides over the double conical enlargement so as to cut off the inlet port 37 and the outlet port 39. The pressure being released, the spring 35 which has been compressed on the discharge stroke of the .flexiblediaphragm returns the diaphragm into the position shown so that the double conical enlargement rides through the opening of the valve and the valve is moved into position to' close the ports 38 and 40 and open the ports 37 and 39, the fluid which has been drawn into the chamber to the oil side ofthe diaphragm being forced out through the port 38 to the crank case and the gasoline is sucked from the low level tank into the chamber on the opposite side of the diaphragm so that when the diaphragm is placed in communication with the lubricating system, the pressure exerted thereby will force the diaphragm to discharge the liquid glerefrom andJforce it to the receiving chamr 3. a

This. is repeated oneach suction and dis char e stroke of the piston so that fuel is constan ber w en the pressure offthe fuel exceeds the predetermined pressure, the relief valve opens so that thefuel instead of being forced. to the receiving chamber 3 is allowed to return to the suction line of the pump. 4 1

F "in the foregoing description it will be seen that I have provided means for utilizing the-pressure of the lubricating system of an internal combustion engine for operating the pum in connection with means for storing the uel and air from the ump in an air-tight receiving chamber whic is provided with a valve which is automatically. opened when the circuit is closed to supply electrical energy to the starting motor.

In order to provide means for ventingthe chamber arrangedabove the charge forming device when used in connection witha'motor the charge formin being supplied to the receiving chamvehicle not employing-an electric starter, I-

use an electric circuit X having a switch so that when the switch is closed, the solenoid is energized and. the valve is opened in order to allow fuel therein to flow by gravity to the I am fully aware that many changes can be made without departing from the spirit of my invention.

What I claim is: v r

1. In a fuel feeding system for internal combustion, engines, the combination with a receiving chamberarranged in a plane above device, ofa diaphragm pump for raising uel from a low level tank to said receiving chamber, said pump comprising a casing havin a chamber to each side of the diaphragm thereof, a fuel passage leading from one of said chambers to said receiving chamber having a relief valve and means for intermittently subjecting thediaphragm of said pump to the pressure of the forced feed lubricating'system of the internal combustion engine for inoving said diaphragm in one'direction' and a spring for returning said diaphragm.

2. In an internal combustion en 'ne, the

combination with a forced feed In ricating system, of a diaphragm pump for supplying fuel to said engine, said pump com r1s1ng a casing having a spring-returned diap ragm' mounted therein to provide separate chambers, a piston rod connected to; said diaphragm, a valve casing in communication with said lubricating system, a valve mounted therein operated by said pistonrod, said valve casing being .in communication with one of the chambers of said jecting the diaphragm of sai pump to the pressure of said lubricating system to cause against the tension of said spring.

signature.

ALBERT G. REDMOND.

pump for sub said diaphragm to move in one direction 

